Enlarged portion of a tire tread



FIG. 1 is a front elevation of an enlarged portion of a tire tread showing the new design on the front of a tire; and,

FIG. 2 is a perspective view thereof.

The broken lines in the drawings depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for an enlarged portion of a tire tread, as shown and described. 